18691744

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{433}}^1$

素因数の和:533

約数の個数: 48

約数和(自身を含む): 39372480

約数和(自身を除く): 20680736

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 71, 76, 142, 152, 284, 304, 433, 568, 608, 866, 1136, 1349, 1732, 2272, 2698, 3464, 5396, 6928, 8227, 10792, 13856, 16454, 21584, 30743, 32908, 43168, 61486, 65816, 122972, 131632, 245944, 263264, 491888, 584117, 983776, 1168234, 2336468, 4672936, 9345872, 18691744]

約数ペア:

[(1, 18691744), (2, 9345872), (4, 4672936), (8, 2336468), (16, 1168234), (19, 983776), (32, 584117), (38, 491888), (71, 263264), (76, 245944), (142, 131632), (152, 122972), (284, 65816), (304, 61486), (433, 43168), (568, 32908), (608, 30743), (866, 21584), (1136, 16454), (1349, 13856), (1732, 10792), (2272, 8227), (2698, 6928), (3464, 5396)]